When you’re flight is delayed or cancelled, you could not blame your airliner immediately. If bad weather is the cause of these, the airlines will refund your ticket but they wouldn’t be held liable for any inconvenience you have endured since it’s beyond their control.
Airlines are not required to compensate for flights which are delayed and canceled due to bad weather or other conditions which they have no control over. Compensation will be done when you are bumped from an oversold flight. If your plane is delayed, you could ask for the airline to pay for your meals and a phone call.